Bear Creek Arsenal BC-15 .300 Blackout 16in Bolt Action Style Upper Receiver, Heavy, 1-8, 5/8X24, Flash Hider, 416R, UABA356300CHB1618SSBCF15ASR

Bear Creek Arsenal BC-15 .300 Blackout 10.5in Bolt Action Style Upper Receiver, Heavy, 1-8 Twist, 5/8X24, Flash Hider, Parkerized, UABA-301-300PHB10.518-10ASR

Bear Creek Arsenal BC15 .458 SOCOM 16in Right Charg Upper Receiver, Heavy, Carbine, 1-14, 5/8X32, Flash Hide, Parkerized, Tungsten, UASCC5053458CHB1611493615TNGSR

Bear Creek Arsenal BC15 12.7x42 18in Upper Receiver, Heavy, Mid-Length, 1-20, 49/64X20, Flash Hide, Parkerized, FDE, UAFC4031127X42MHB1812015FDESR

Bear Creek Arsenal BC-15 .300 Blackout 8.5in Bolt Action Style Upper Receiver, Heavy Barrel, 1-8 Twist, 5/8X24, Flash Hider, Parkerized, UABA-349-300PHB8.518-7ASR

Bear Creek Arsenal BC-15 .300 Blackout 16in Bolt Action Style Upper Receiver, Heavy Barrel, 1-8 Twist, 5/8X24, Flash Hider, 416R, UABA-314-300CHB1618SS-15ASR

Bear Creek Arsenal BC-15 5.56 NATO 20in Bolt Action Style Upper Receiver, Government Profile, 1-8, 1/2X28, Flash Hider, Black Nitride Cold Hammer Forged, UABA323556RGVNT2018MHF15ASR